Poetry relies on figurative language largely because it 1. establishes the poem's rhythm. 2. condenses emotions and events. 3. explain complex concepts.

According to common rules of usage of figurative language and its role in poetry, I am absolutely sure that poetry relies on figurative language largely because it helps explain complex concepts. If you read the definition of figurative language in poetry or rhetoric, you will see that it does not even connected with rhyme and emotional tone establishing so you can definitely cross out first two options. The last one is the only right answer there.

Singular third person pronouns are “he,” “she,” “it,” “his,” “hers,” “him” and “her,” and third person plural pronouns are “they,” “them” and “their.” the number of people to which you are referring should always match the pronoun you choose (“he” to refer to one male, “they” to refer to more than one male).